BY FREDERICK A. A. SKUSE. 307 



marginal cell about J longer than inner marginal, of equal width ; 

 second longitudinal meeting costa somewhat beyond tip of anterior 

 branch of fifth longitudinal fork ; slight trace of portion of 

 anterior branch of third longitudinal, appearing almost like a 

 wing-fold ; fork of fourth longitudinal with a short petiole, base 

 of fork opposite tip of posterior branch of fifth longitudinal, the 

 anterior branch reaching margin immediately below apex of wing ; 

 anterior branch of fifth longitudinal fork short, arcuated. 

 Hah. — Berowra, N.S.W. (Skuse). January. 



288. Ceratopogon imperfectus, sp.n. (PL xiv., tig. 46). 



^. — Length of antennae — inch ... — millimetre. 



Expanse of wings O'OSlx 0-011 ... 0-62 x 0-27 



Size of body 0-025 x 0-008 ... 0-62 x 0-20 



Antennae lost. Black or very deep brown, opaque ; legs yel- 

 lowish ; halteres pale yellow. Abdomen short, the width of the 

 thorax. In fore legs tibia not (?) twice the length of metatarsus. 

 Wings the length of entire body, naked, cuneiformly narrowed at 

 base, pellucid, with a delicate brownish tint, and rich cupreous 

 reflections ; brown between costal and second longitudinal veins 

 for some distance before their tip ; costal, first two longitudinal 

 veins, middle cross-vein and basal half of fourth longitudinal 

 brownish. Auxiliary vein invisible ; first longitudinal reaching 

 costa at middle of anterior margin, but considerably before base of 

 fifth longitudinal fork; second longitudinal meeting costa almost 

 opposite tip of anterior branch of fifth longitudinal fork ; basal 

 portion of fourth longitudinal, middle cross-vein and second longi- 

 tudinal almost in one straight line ; no trace of third longitudinal; 

 anterior branch of fourth longitudinal entirely missing, posterior 

 branch extremely pale and indistinct, disappearing close to margin 

 a little below apex of wing ; fifth longitudinal extremely pale and 

 indistinct, fork very short, both branches disappearing much before 

 the wing-margin, the posterior branch very short. 



Hah. — Middle Harbour, near Sydney (Skuse). One specimen 

 in September. 



